Method of coating lace with metal.



- T e effect of this application of potassium and allowed to partiallydry but before the or extend through a number of points on the number ofsuchv connections is to have the alloy capable of electrodeposition maybe deposited on the lace in the usual way." I

men.

METHOD OF com-me. LACE WITH METAL.

No. season Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed Ootoberlfi, 1901. Renewed December 5, 1904. Serial No.236.548.

To all whom it may concern:

Be it known that I, JOHN ANDRE DALY, residing at Washington, District ofColumbia, have invented certain new and useful Im rovements in Method ofCoating Lace Wit Metal, of which the following is a specification. i V

.This invention relates to a method of coatinglace or similar knitted,netted, or woven fibrous or textile open-Work material with metal. t

The object of the invention is to cover or electroplate the finest lacesand gauzy fabrics with a metal of uniform thickness.

In the preparation the lace is stretched on a frame, as is the case formany other urposes. I then cover the fibers of the ace with a thin, evencoating of shellac. This may be applied with a brush to both faces ofthe lace. The shellac-is thorou hly dried and serves to stiffen-thelace. en the stretched lace is dry, the surface is covered with anaqueous solution of nitrate of silver sliver .nitrate has thoroughlyhardened the surface is again painted or covered by an a ueous solutionof' sulfid of potassium.

sulfid is to decompose the nitrate of silver, the roducts of. suchdecomposition being sulfid of silver and nitrate of potassium. The laceis now washed in water, which removes the soluble nitrate of potassium,leaving the lace covered with a coati of sulfid of silver, which is aconductor of e ectrieity. Thiscoating of sulfid of silver iscomparetively inertand will not destroy the fiber of the lace by itscaustic properties. The lace so prepared is then connected with a numberof thin copper wires; which wires lead to surface of the lace.' -.l heobject ofhaving a electrodeposit begin a number of places and spreadrapidly,.so as to save time and also to give a substantially uniformcoating of electrodeposited metal. The lace so coated and wired is thensuspended by the wires or otherwise in a platl bath, and electricalconnections are ma e with the wires and bath, so that an electrodepositof metal maytake lace on the surface of the iace, the sulfid 0. silverserving as a conductor for the electrodeposit. Any metal or maining. Itis then washed. The lace' is then spread or stretched out and brushedover on both sides with a scratch brush to bind the crystalline metal ofthe deposit more firmly together and to the fibers or threads of thelace. The brushing down with a scratch-brush compacts the metal on thethreads, serving to exclude acids during the subsequent treatment. Afterthe metal is .compacted by the scratch-brush no further Wiring isrequired than the usual wire or metalhc connections such as are usual inelectroplating. When so connected and again immersed in a plating-bath,the electord'eposit of metal may be continued tothe desired thickness. cv When it' is' desired to retain the lace in flexible condition, thefirst step of coating H the lace with shellac is dispensed with. The

.nitrate of silver is applied directly. tothe lace.

Heretofore a conductor has sometimes been made by'treatment of lace withnitrate of silver. This material is so caustic that it sometimesdestroys-the fine fibers or threads I of'the' lace and renders thecoarser threads and masses ofthe lace weak and easilybroken,"like"charred wood; I By neutralizing I the. caustic propertiesof the nitrate almost immediatel this defectis avoided, and the strength0 [the lace-is substantially pre served."

preliminarydeposit in the bath, the "basic metal is made. stronger andfiner, and a better finished-as well as a stronger article of metal-, a

lized lace results.

What I claim ise-f The method (if-team 1a.. with metal,

fying this preliminary deposit on the threads by mechanical action, enadding further e ectrodeposited metal.

The method of coating lace with metal.

solution of "sulfid of potassiiim, then wash-' aid electrotie whichconsists treating the lace vvith a solution of nitrate'of silver,"'thenvvith a solu tion of sulfid of potassium, thus securing a conductingcoating, then depositing a preliminary metallic coating thereon in anelectroplating-hath, then removing from the bath, com acting the metalon the lace by mechanicai means, and de ositing further metal thereon inan electropihting-bath.

The method "of coating 'Iace with metal whichconsists in stretching thelace on a frame, covering the th'reeds of the'lace With a thin varnishto stiffen the same, then coverihg the varnished threads with a solutionof nitrate of silver, then applying an aqueous ing with water, thenmaking" Wire connec- 'tions With a nnlnher Ofpoints on the lace,

' ositing a metalthereon.

p 4. The met od 01' covering threads of lace with metal, which consistsin stretching the lace" on a frame, then"covering' the threadsorvveb'fof lace' with an aqueous solutionof nitrate of silver, then withan aqueous solutionof siilfid of potassium, then washing with water,then making an electrodep'osit on the labs in an electroplating-bath. v

v l The'method of covering lace Withme'tal, which consists in stretchingthe lace on a frame, securing a' 'c ondi1ctor on the lace, connestingconducting-wires to the lace at n'umerous'po'ints', and depositing metalmijsaid lace and condnctor'in an electroplating-hath. 6. The method of-coatingfibrous la'ce with 'pointsto metallic Wire conductors,

metal, which consists in holding the mesh of the-liaise extended,dVIi-Ii the threads of the lace by a coating of sulfid of silver,conheating the 'threadsof'lace to copper conducting-wires at numerouspoints, making a preliminary deposit of copper thereon, then removingthe conducting-wires and after- "ward increasing the copper deposit. a

7. The methqd of covering fibrous lace with metal, whichconsistsnfholdin the mesh ofthe la'cein extended position, developing'an'electrical conductor on the threakls o the lace, connecting "the web'at numerous making a. preliminary electrodeposit on thethr'eads oflace, then removing the metallic wireconductors and"subsequent1yelectrodepositing additional metal on'the'lace.

' '8. The methodpf coatin "lace withmetal, V

which consists in holding the. mesh of'the lace in extended position,securing; a conductor on the surfaceof the la'ce'hy" covering": it

first with a solutionof nitrate *of silveraind then with an alkalinereagent, conhe'ttingthe mesh of the extended "lace at various-points to:conducting-wires of a plating-Battery',1and' lace.

two 'vvitnesses.

' In testlmony'ivhereoi I'affiX-my signature 7 60. i electrodepositingmetal on the threads of the I

